The last time I had Five Guys, seems I remember the meal costing 15-20 dollars USD, which is not what I would consider cheap at all, but this is the average price of a "premium" fast food meal nowadays.
This is how the fries come here at Five Guys: (usually no container, just in the bag.. lol)

source

And yeah they're pretty good.. 😄
Sounds like it was a nice time mate, thanks for sharing :)